Regular

Lord Vetinari inspected the rails and the little carts the dwarfs had used to shift spoil. He felt the dry walls, He went back upstairs and frowned as a one-ton slab of iron came through the wall, whirled past his face, passed through the opposite wall, and buried itself in the street outside.
“And was that supposed to happen?” he said, brushing plaster dust off his robe.

– hanging out with Leonard has gotten him used to this |
Terry Pratchett, Thud!